instance method append_conditions

# File activerecord/lib/active_record/association_preload.rb, line 408
      def append_conditions(reflection, preload_options)
        sql = ""
        sql << " AND (#{process_conditions_for_preload(reflection.options[:conditions], reflection.klass)})" if reflection.options[:conditions]
        sql << " AND (#{process_conditions_for_preload(preload_options[:conditions])})" if preload_options[:conditions]
        sql
      end